Absolutely, we ordered what Evan the Mgr. called Caribbean Dream, it had pineapple, sausage and pepperoni, onion and olives, it was given to us the next night in a real pizza box and we ate it in our room. It was delish. That was Odyssey but we've done that on other ships too. even in Promenade Cafe.
We've also taken food from the MDR. They gave it to us on a plate with the vented plastic covers. AGAIN, maybe ASK!